Published August 22, 2025 | Version v2
Preprint Open

Preparing for Small-Scale Ocean Buffering Using Alkaline Rock and Nannochloropsis: A Pre-Trial Protocol for a Grassroots Approach to Carbon Sequestration and pH Stabilisation v2

Creators

  • 1. Ocean Buffer Project

Description

This pre-trial protocol outlines a grassroots experiment using Nannochloropsis microalgae and locally sourced alkaline rock (serpentine) to investigate small-scale ocean buffering and carbon drawdown. Developed as part of the Ocean Buffer Project in Cornwall, UK, this trial proposes a simple, low-impact design using recycled materials to simulate biogeochemical carbon sequestration and pH stabilisation processes. The study aims to demonstrate that algae photosynthesis and mineral weathering can work synergistically to raise water pH and reduce dissolved CO₂. This paper shares the hypothesis, methodology, and design for a 12-week trial preceding formal data collection. All materials have been chosen for food safety, low impact, and circularity. A peer-reviewed research paper will follow upon completion of the trial phase. The author welcomes constructive dialogue and collaboration.

 

Notes

This update replaces Chlorella vulgaris with Nannochloropsis sp. following further research and pilot planning. Nannochloropsis was chosen for its robust growth in marine conditions, widespread aquaculture use, and high carbon content. The rationale, methodology, and references have been revised accordingly. Version 1 remains accessible for transparency.

Files

Files (284.3 kB)

Additional details

Funding

Cornwall Council
Cornwall Climate and Nature Fund

Dates

Issued
2025-08-22
This pre-trial protocol outlines a grassroots experiment using Nannochloropsis microalgae and locally sourced alkaline rock (serpentine) to investigate small-scale ocean buffering and carbon drawdown. Developed as part of the Ocean Buffer Project in Cornwall, UK, the trial proposes a simple, low-impact design using recycled and food-safe materials to simulate biogeochemical carbon sequestration and pH stabilisation processes. The study hypothesises that algae photosynthesis and serpentine mineral weathering will increase water pH and reduce dissolved CO₂ under synthetic marine conditions. The protocol details the trial design, methodology, and material choices, with emphasis on circularity, community replicability, and environmental responsibility. This preprint precedes data collection. A peer-reviewed research paper will follow upon trial completion.